多跨连续梁桥的隔震方案研究  

Study on Seismic Isolation Schemes of Multi-span Continuous Girder Bridge

作　　者：邱新林[1,2] 廖平[1] 赵人达[1] 贾毅[1] 占玉林[1,3] 傅光奇 QIU Xinlin LIAO Ping ZHAO Renda JIA Yi ZHAN Yulin FU Guangqi(School of Civil Engineering, Southwest Jiaotong University, Chengdu Sichuan 610031, China Chaozhang Expressway Management Center of Nanyue Communication in Guangdong Province,Guangzhou Guangdong 510101, China National Engineering Laboratory for Technology of Geological Disaster Prevention in Land Transportation, Chengdu Sichuan 610031, China)

机构地区：[1]西南交通大学土木工程学院,四川成都610031 [2]广东省南粤交通潮漳高速公路管理中心,广东广州510101 [3]陆地交通地质灾害防治技术国家工程实验室,四川成都610031

出　　处：《铁道建筑》2017年第6期41-43,52,共4页Railway Engineering

基　　金：广东省交通厅科技计划(2014-02-015)

摘　　要：为改善多跨连续梁桥的抗震性能,以(55+4×90+55)m的韩江特大桥主桥为研究背景,采用ANSYS软件建立全桥有限元模型,应用非线性时程分析方法对不同减隔震支座方案的桥梁结构地震响应进行分析。研究结果表明:不同减隔震支座方案下韩江特大桥主桥纵飘和主桥横弯振型出现的阶数与对应的自振频率均不同;韩江特大桥主桥的减隔震支座方案宜优先选用摩擦摆减隔震支座,在隔震支座选型时应综合考虑墩底弯矩、墩梁相对位移、支座位移等多项指标。In order to improve the seismic performance of multi-span continuous girder bridge,the Han River Bridge with spans of（ 55 ＋ 4 × 90 ＋ 55） m was selected as the research background. The software ANSYS was used to establish the finite element model of full bridge,and the seismic responses of the bridge structure with different seismic isolation bearings were analyzed and compared on the basis of the nonlinear time history analysis method. The results showthat the longitudinal floating vibration mode,transverse bending vibration mode and the corresponding frequencies of the Han River Bridge under different isolation schemes are different. Friction pendulum isolation bearing should be preferred as isolation bearing scheme of the Han River Bridge. The bending moment at pier bottom,the piergirder relative displacement and the bearing displacement should be taken into consideration during the selection of seismic isolation bearing scheme.

关 键 词：多跨连续梁桥 隔震支座 非线性时程分析法 韩江特大桥 自振特性 地震响应 

分 类 号：U442.55[建筑科学—桥梁与隧道工程]